A Pennsylvania man fatally shot four of his family members and set fire to their family home, killing another relative trapped inside, prosecutors said in a press conference on Wednesday.

Canh Le, 43, is accused of fatally shooting his younger brother Xuong Le, 40, along with Les wife Britni McLaughlin-Le, 37, and the couples two children, Natalya, 17, and Nakayla, 13, Delaware County District Attorney Jack Stollsteimer said, citing medical examiners.

The couples youngest child, Xavier, 10, was also killed after Canh Le set the home on fire, he said. The 10-year-olds cause of death was determined to be from smoke inhalation.